Thomas j



T. J. FAY.

PROCESSOF TEMPERING METALS.

APPLICATION FILED JUNE l. 1914 1,318,367. lzltcnfod' Oct, 14,1919.

I I l I To all whom it may concern of New York, have 'raomas :r. FAY, orisnookihzn', iw'Ew THE STANDARD PARTS commune Iipplicatien filed .1 ani, 1

Be it known that' I, THOMAS J. FAY, a

citizen of the United States, residing at metals and more'part-icularlyto a process 'perature is sufficient to heat the article's m andapparatus whereby the articles to '-be tempered are maintained at auniform tei'n perature throughout their length and-without liabilitytoburn. In carrying out my invention I make use of abatliof'granularrefractory material (preferably quartz sand) which, by the apparatusemployed, is maintained at a uniform teniperature throughout its entireextent. and which tema sufficient degree to enable theni to be temperedby subsequentlysubjecting them to a qiiencliiii'gbath in the usualmanner. While, capable, broadly speaking, of utilization for the heattreatment of ,various articles, it is particularly well adapted-for theheat treatment of vehicle springs, and the embodiment herein set forthis designed with special ref: erenee to the treatment of plates of thetype that enter into the -construction- 'o.f such springs.

ln' order to produce .a satisfactorily and uniformly temperedproduct--especially in the art of spring iuaking--it is'inipoi'tant thatthe steel plates be not subjected toexcessire temperatures,whicliavillburn the steel; it is further important that the tem' perature to whichthe didei'eiitplatcs are heated shall be uniform. l secure, theforegoing drsiderata. as well as others which will he. pointed outhereinafteg in and through my process and apparatussct forth herein.

In the drawings annexed hereto and forming part hereof, Figure 1represents a vertical, transverse sectional view through a furnaceconstructed in accordance with, my inycntion and adaptal'ile on therealizatioirof my process; and Fig. 2 a- \'0l'tl(': .l, longitudinalsectional view through the said furnace, the position of the lines onthe part rnocnss or (mummies Murnnsi 1 Speciiicatioii of Letters Patent.-]?at ented t;

' wall is provided with pact and-distributing -m'ater1al1against whichthe burner no'Zzle' '10 'dition to distributing and the top or roofsand(or easily embedded therein;

Yank, nssrcnonjay MESNE As smm mms; are or cmvnnmn, OHIO, A comma-non oromo 914.. semi no. 841,982.

ofsection beingindi'cated inbrokenflinesf.

parts illustrated herein,

2 the rear, 3 the side walls, and 4 the arched top of a furnace. These'are flomposad I? a central open ng -,.l s

of suitable refractory material. The front intothe lower 'partwhereofthere 'prtiJe'cts];

an injector burner nozzle 6 adapted to:s'up -I I with, a gaseous.fillld. (as steam' or air, or, both) into the combustion chamber 7 inthe bottom of thefurnace, 8 denotes anlimfi block ofrefractory;

is adapted to discharge, the jblockf' wlien heated, -facilitating thecombustion of" the fluid mixture dischargedthereagainst inadtheflame inand throughout the combustion chamber. 7 The side andend walls areprovided with ledges 9, IOah-d 11 forming a seat for a refractory block12 covering 13" which may be of cast iron or other suitableheating-resistant material. v Above the block 12 and between the samehis a tempering chamber 14. which communicates with tlie'c'ombiistionchamber 7 by means of the fines 15 iii the side walls 3. The number ofthese fines will vary with the length of the chambers 7 and lip In thedrawing, foiir such fines are provided in each wall 3, and theflues inone wall are staggered with respect to those in the other in order tofacilitate-even distribution of the gases of combustion throughout thetempering chamber 14. Outlet flues l6 serve to discharge the products ofcombustion 't'roiii the chamber 14. The pan 13 contains a quant ty offinely divided granular material, such as quartz sand, the

' of the furnacewhich is removed the plane 55 Describingby referencecharacters the i 1 denotes thefront,

the top. of the i chamber 7. This block supports a large pan depth ofthematerial being sufiicient to receivc tlierewitliin andentirely cover thewhen placed on edge therein, the

plates 17 finely divided refractory material) being indicated at 18. Inractice I have found quartz sand to be particularly efficient in therealization of my process as it is so mobile asto permit tl e'st'eelplates to be the degree desirable for tempering, this mor when heated tobility is increased, and no difliculty is encounteredin embedding orimmersing the lates therein.- I Furthermore it provides a eat-storingbody whichremalns in a solid granular and iufusible conditionnotwithstanding the temperatures to which it is I subjected.

' .fired for alength of time sufiicient to In operation; after the'furnace has been heat the sand to the desired temperature, the platesare embedded therein with their lateral faces substantially vertical, asshown in'the drawing. Owingk to its finely divided and heated condition,t

mobile to rpermitlthe plates to be embedded e sand is sufiicieutlytherein with no material resistance to this action, althou h affordingsufiicient support to the lateral aces of the plates to assistmaterially in maintaining them in an uprightposition. The plates arethus protected against the licking action of the flame (and will beuniform-throughout the attendantshoclr upon .the molecules of the steel)and the plates, through the arrangement of the sand bath relative to the5'heating fiues, may be maintained in such protected condition at atemperature which the period re} quiredjfor the heating of each plateand which will be uniform as to all of the plates thus treated. a

It will be understood that the furnace will be provided with athermostat, suitably 10- cated and operatively connected with the fuelsupply leading to the burner, whereby the temperature in the furnace andparticularly in the sand-bath may be mamtained at the desired degreethroughout the operation of thefurnace.

Having thus described my invention what I claim is The process oftempering plates which therein the temperature necessary-for thetempering operation.

In testimony whereof, I hereunto afiix my I signature in the presenceoftwo'witnessesi ,'THOMAS J. FAY. Witnesses:

J. B. HULL, o BRENNAN B. WEST.

